Answer:
The correct option is C) Store B is reducing prices by 5% more than Store A.
Step-by-step explanation:
Consider the provided information.
Store B is advertising a sale that will reduce prices on all merchandise by one over five.
Convert one over five in percentage as shown below:



Thus, the store B reduce the prices by 20%.
Store A reduces the prices on all merchandise by 15%.
From the above calculation, it is clear that store B reduces more prices by 5%.
Therefore, the correct option is C) Store B is reducing prices by 5% more than Store A.